壳聚糖修饰炭黑负载Pt-Au催化剂对甲醇氧化的电催化性能

陈伟; 廖卫平; 金明善; 索掌怀

壳聚糖修饰炭黑负载Pt-Au催化剂对甲醇氧化的电催化性能

烟台大学应用催化研究所, 山东烟台 264005

基金项目: 山东省科技攻关计划(2009GG10007022); 山东省自然科学基金(ZR2011BM024)。

详细信息

通讯作者:
索掌怀,Tel:0535-6902514, E-mail:zhsuo@ytu.edu.cn。

中图分类号: O643
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- 被引次数: 0
出版历程
- 收稿日期: 2012-03-13
- 修回日期: 2012-06-18
- 刊出日期: 2012-12-31

Electrocatalytic performance of Pt-Au catalysts supported on chitosan-modified carbon black for methanol oxidation

Institute of Applied Catalysis, Yantai University, Yantai 264005, China

摘要

摘要: 以炭黑及自制的壳聚糖-炭黑(CHI-C)复合材料为载体,采用溶胶负载法制备了Pt_m＾Au/C及Pt_m＾Au/CHI-C催化剂(＾代表Au、Pt为分步负载,m代表Pt/Au原子比),通过紫外-可见吸收光谱、X射线衍射、透射电镜及X射线光电子能谱对催化剂进行了表征。利用循环伏安法和计时电流法分别测定了Pt-Au催化剂对甲醇电催化氧化反应的活性和稳定性,考查了Pt/Au原子比及CHI改性对电催化活性和稳定性的影响。结果表明,Pt_1.0＾Au/C具有最高的催化活性,炭黑中加入少量CHI能提高Pt_1.0＾Au/C催化剂的稳定性。
- 铂 /
- 金 /
- 炭黑 /
- 壳聚糖 /
- 甲醇氧化 /
- 电催化
Abstract: Chitosan-carbon composite material (CHI-C) was prepared. Pt-Au catalysts supported on chitosan-modified carbon black with different Pt/Au atomic ratios were prepared by a sol immobilization method. The samples were characterized by UV-visible absorption spectroscopy, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. The activity and stability for methanol electrocatalytic oxidation reaction were evaluated by cyclic voltammetry and chronoamperograms, respectively. The effects of Pt/Au atomic ratios and chitosan modification on the activities and stabilities were studied. As a result, Pt_1.0＾Au/C catalyst showed the best catalytic activity. Adding small amount CHI to carbon black support can improve the stability of Pt_1.0＾Au/C catalyst.
- platinum /
- gold /
- carbon black /
- chitosan /
- methanol oxidation /
- electrocatalysis

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参考文献(25)

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